Eternity.

Books do not per­ish like hu­mankind. Of course we commonly see them bro­ken in the hab­er­dash­er's shop when on­ly a few months be­fore they lay bound on the sta­tion­er's stall; these are not true works, but mere trash and new­fan­gle­ness for the vul­gar. There are thou­sands of such gew­gaws and toys which peo­ple have in their cham­bers, or which they keep up­on their shelves, be­liev­ing that they are pre­cious things, when they are the mere pass­ing fol­lies of the pass­ing time and of no more val­ue than pa­pers gath­ered up from some dunghill or raked by chance out of the ken­nel. True books are filled with the pow­er of the un­der­stand­ing which is the in­her­itance of the ages: you may take up a book in time, but you read it in eter­ni­ty.

Peter Ackroyd, from The House of Doctor Dee